1. Department of Human Movement Science, Nelson Mandela University, Gqeberha 77000,
South Africa
2. Department of Sport, Exercise and Health, University of Basel, 4052 Basel,
Switzerland
3. Novartis Foundation, 4056 Basel,
Switzerland
4. University of Basel, 4052 Basel,
Switzerland
5. Swiss Tropical and Public Health Institute, 4123 Allschwil,
Switzerland